Polarization Maintaining Multiplexer
Polarisation-Maintaining DWDM Multiplexer
The PMUX is built around a high-performance polarisation-maintaining arrayed waveguide grating (AWG) for precise DWDM channel multiplexing on the ITU grid. This...
Polarization Maintaining Multiplexer
High-performance C/L-band polarisation maintaining multiplexer for coherent DWDM optical testing
Polarisation-Maintaining DWDM Multiplexer
The PMUX is built around a high-performance polarisation-maintaining arrayed waveguide grating (AWG) for precise DWDM channel multiplexing on the ITU grid. This design ensures minimal insertion loss, even in high channel-count optical systems, while strictly preserving the polarisation state of each laser line. As a result, the PMUX delivers stable and repeatable performance for demanding coherent optical communication and DWDM test applications.
Stable Polarisation for Advanced Optical Modulation
By maintaining a stable output polarisation across all channels, the PMUX enables reliable downstream modulation using Mach–Zehnder modulator (MZM) structures. This polarisation stability is critical for dual-polarisation and IQ modulation schemes, ensuring consistent modulation efficiency and signal integrity. The PMUX, therefore, serves as an ideal front-end component for coherent transmitter setups and optical signal generation.
Emulation of DWDM Spectra for System Testing
The combination of polarisation-maintaining multiplexing and precise channel alignment allows users to arbitrarily modulate a channel comb to accurately emulate real-world DWDM spectra. This makes the PMUX a powerful tool for DWDM system emulation, transceiver validation, and multi-channel optical testing in both R&D laboratories and production environments.
Understanding Polarization Maintaining Multiplexer
The PMux is a next-generation optical signal combiner specifically designed for Dense Wavelength Division Multiplexing (DWDM) test environments. It integrates polarisation-maintaining (PM) PANDA-type fibers and advanced Mach-Zehnder interferometric structures to ensure stable, interference-free transmission across all channels.
This state-of-the-art system is perfect for users who require low insertion loss, high extinction ratios, and consistent polarisation across a large number of DWDM channels. The PMux is ideal for:
- Creating high-density DWDM channel combs
- Emulating real-world network environments
- Testing optical amplifiers, transponders, and components
- Developing and verifying new network architectures
Technical Specifications
| Parameter | Value |
| Channel Spacing | 50 GHz / 100 GHz (user-configurable) |
| Insertion Loss | < 6.0 dB |
| Uniformity Across Band | 1 to 1.5 dB |
| Polarisation Extinction Ratio | ≥16 dB (20 dB typical) |
| Channel Range | Custom-configurable |
| 3dB Pass Band | 0.55 nm (for 100 GHz spacing) |
| Channel Center Offset | ±0.04 nm |
| Input/Output Connectors | FC/APC, FC/PC, SC/PC |
| Optical Fiber Type | Polarisation-maintaining PANDA fiber |
| Operating Temperature Range | 0°C to 50°C (non-condensing) |
| Storage Temperature Range | -20°C to +70°C |
| Power Supply | 100–240 VAC, 2A, 50/60 Hz |
| Dimensions (HxWxD) | 100 x 460 x 540 mm (4 x 19 x 21 inches) |
Key Features and Advantages
High-Performance DWDM Channel Grid Generation
- Supports 50 GHz or 100 GHz channel spacing
- Enables generation of stable, dense wavelength grids for rigorous testing
- Ideal for multi-channel optical system evaluation
Polarisation-Maintaining Architecture
- Uses PANDA PM fiber for consistent polarisation preservation
- Prevents polarisation-dependent loss and distortion
- Essential for modulation format testing, such as QPSK or QAM
Flexible Grid Configurations
- Available in fixed and flexible grid formats
- Flexible grid options eliminate the need for costly WSS or tunable filters
- Perfect for both standardised and customised test environments
Autonomous, Maintenance-Free Operation
- Fully autonomous after power-up
- Reliable 24/7 operation, ideal for long-term production testing
- Minimal calibration or manual intervention required
Rack-Mountable Industrial Design
- Standard 19-inch rack compatibility
- Rugged construction for lab or factory use
- Compact size: 100 x 460 x 540 mm
Seamless Integration with CoBriteMX Lasers
- Optimised for plug-and-play use with CoBriteMX Tunable Lasers
- Simplifies setup for DWDM grid generation and modulation testing
Windows-Based GUI for Easy Monitoring
- Remote access via USB interface
- Real-time system status, control, and diagnostics
- Intuitive interface for test engineers and researchers
Applications Across Industries
DWDM Transport Testing
Simulate realistic DWDM channel environments to test the performance of:
- Optical transponders
- Optical amplifiers (EDFAs, Raman)
- Fibre links and dispersion compensation systems
Optical Network Simulation
The PMux is indispensable for simulating multi-wavelength systems under controlled conditions. It is used extensively in:
- Network research labs
- Next-generation optical switch development
- Passive and active component qualification
Modulation Format Testing
When combined with a tunable laser like CoBriteMX, the PMux allows engineers to:
- Generate modulated DWDM combs
- Evaluate signal quality (Q-factor, BER) across all channels
- Perform high-fidelity coherent transmission testing
Optical Component Manufacturing
Used for automated production testing of:
- Modulators
- Transceivers
- Wavelength-specific optical components
The PMux ensures that manufactured components meet standards for insertion loss, channel uniformity, and polarisation fidelity.
High Channel Count Simulation
Need to test 40, 80, or even 100+ channel systems? The PMux handles ultra-high-density grids with:
- Minimal power variation
- Tight channel centre tolerances
- Exceptional repeatability
Why Choose United Spectrum Instruments?
As India’s official channel partner for this advanced solution, United Spectrum Instruments ensures full local support, competitive pricing, and expert consultation. The PMux’s unique benefits include:
Superior Polarisation Control
Essential for advanced optical modulation formats and coherent signal integrity.
- Scalable Testing with Minimal Complexity Save time, reduce costs, and eliminate the need for complex grid generation equipment.
- Reliability You Can Trust Built for continuous use in test labs, R&D centres, and telecom environments.
- Seamless Workflow with CoBriteMX Plug-and-play integration saves engineers time and reduces errors in complex setups.
- Local Support in India Access pre-sales consultation, post-sales technical support, and fast delivery through United Spectrum Instruments.
FAQs
What makes the PMux ideal for DWDM testing?
The PMux generates stable, high-density channel combs with excellent polarisation integrity, making it ideal for testing DWDM transponders, amplifiers, and network elements.
Can the PMux support flexible grid configurations?
Yes. It supports both fixed and flexible grid options, which can be selected based on your application needs. Flexible grids remove the need for tunable filters or WSS devices.
Is the PMux compatible with third-party lasers?
While it is optimised for CoBriteMX lasers, the PMux can technically work with other tunable laser sources, provided they meet optical interface requirements.
Does the PMux require any software or drivers for operation?
The PMux is equipped with a user-friendly GUI compatible with Windows systems and communicates via USB. No additional drivers are required for standard operation.
Can I request custom configurations for the PMux?
Absolutely. United Spectrum Instruments can coordinate with the manufacturer to deliver PMux systems with custom channel counts, spacing, or output configurations tailored to your project.
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FAQs
What makes the PMux ideal for DWDM testing?
The PMux generates stable, high-density channel combs with excellent polarisation integrity, making it ideal for testing DWDM transponders, amplifiers, and network elements.
Can the PMux support flexible grid configurations?
Yes. It supports both fixed and flexible grid options, which can be selected based on your application needs. Flexible grids remove the need for tunable filters or WSS devices.
Is the PMux compatible with third-party lasers?
While it is optimised for CoBriteMX lasers, the PMux can technically work with other tunable laser sources, provided they meet optical interface requirements.
Does the PMux require any software or drivers for operation?
The PMux is equipped with a user-friendly GUI compatible with Windows systems and communicates via USB. No additional drivers are required for standard operation.
Can I request custom configurations for the PMux?
Absolutely. United Spectrum Instruments can coordinate with the manufacturer to deliver PMux systems with custom channel counts, spacing, or output configurations tailored to your project.
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